subtract 10%iles      0.00000   0.00203130    0.0319486    0.0647774
     0.103996     0.157041     0.236166     0.372809     0.695974
diff 10%iles    -0.250521   -0.0981300   -0.0412588  -0.00981522      0.00000
   0.00795865    0.0398259    0.0980946     0.253038
stardiff 10%iles   -0.0384917   -0.0126381  -0.00349114      0.00000
  0.000894852   0.00604560    0.0125527    0.0232246    0.0503903
stardiff contour -excluded 0.005   -0.0384917    0.0503903